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Pyruvate relieves the necessity of high induction levels of catalase and enables Campylobacter jejuni to grow under fully aerobic conditions.

Abstract：

AIMS:Several cases of campylobacteriosis reported worldwide seemingly conflict with the strict growth requirements and sensitivity to environmental stress of Campylobacter jejuni. In this study, the need for a micro-aerobic environment [dissolved oxygen tension (DOT): 0.1-90%; 100% air saturation)] and the adaptive responses to oxygen stress were studied. METHODS AND RESULTS:The growth of C. jejuni in continuous culture was assessed under different DOT in the presence or absence of pyruvate. In a medium without pyruvate, continuous cultures of C. jejuni showed typically micro-aerobic behaviour and cells were unable to grow under fully aerobic conditions. However in the presence of pyruvate (25 mmol l(-1)), continuous cultures of C. jejuni were able to grow in a broad DOT range, varying from 0.1% to at least 90%, and the catalase activity was decreased. CONCLUSIONS:Addition of pyruvate results in the decrease in the concentration of hydrogen peroxide, which enables C. jejuni to grow aerobically. SIGNIFICANCE AND IMPACT OF THE STUDY:New information on the oxidative physiology of C. jejuni and its ability to grow aerobically in media supplemented with pyruvate is presented.

journal_name

Lett Appl Microbiol

journal_title

Letters in applied microbiology

authors

Verhoeff-Bakkenes L,Arends AP,Snoep JL,Zwietering MH,de Jonge R

doi

10.1111/j.1472-765X.2008.02326.x

subject

Has Abstract

pub_date

2008-03-01 00:00:00

pages

377-82

issue

3

eissn

0266-8254

issn

1472-765X

pii

LAM2326

journal_volume

46

pub_type

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